The languid pose of the figure – hip jutting out as he leans against a vine stump – is derived ultimately from the celebrated works of Praxiteles. The most famous example of the pose was the Apollo Sauroktonos (Lizard-Slayer), known through numerous Roman marble copies of the lost bronze. The use of the drill in defining the leaves and grapes suggests that this work was carved in the Antonine period of the Roman Empire.
Source: Eye of the Beholder, edited by Alan Chong et al. (Boston: ISGM and Beacon Press, 2003): 14.